公开(公告)号：US06611834B1

公开(公告)日：2003-08-26

申请号：US09481359

申请日：2000-01-12

申请人： Gaurav Aggarwal ,  Deepavan Chakrabarti ,  Pradeep Kumar Dubey ,  Nitin Punamkumar Garq ,  Sugata Ghosal ,  Ashish Kumar Gupta ,  Ashutosh Kulshreshtha ,  Sreerama Kolluru Venkata Murthy

发明人： Gaurav Aggarwal ,  Deepavan Chakrabarti ,  Pradeep Kumar Dubey ,  Nitin Punamkumar Garq ,  Sugata Ghosal ,  Ashish Kumar Gupta ,  Ashutosh Kulshreshtha ,  Sreerama Kolluru Venkata Murthy

IPC分类号： G06F1730

CPC分类号： G06F17/30867 ,  G06F17/3056 ,  Y10S707/99932 ,  Y10S707/99933 ,  Y10S707/99952 ,  Y10S707/99953

摘要： A user at a client machine can customize components of a database search performed at a server. The user does this by sending executable code to the database server. Software code runs as middleware on the database server machine to communicate between the database server and the client and performs the functions of supplying the client with vital information required for generating code which will be used for customizing various processes of the database retrieval session. Typically, the server comprises a set of database servers and the middleware runs on each database server machine to communicate between the database servers and the client. The middleware provides a virtual machine on which the user-supplied code written in a virtual machine language is executed, giving a uniform interface across the set of database servers on which the same user-supplied code will be executed ensuring that the user-supplied code executes under database server specified access privileges.

摘要翻译： 客户端机器上的用户可以定制在服务器上执行的数据库搜索的组件。 用户通过向数据库服务器发送可执行代码来执行此操作。 软件代码作为数据库服务器机器上的中间件进行运行，以在数据库服务器和客户端之间进行通信，并执行为客户端提供生成代码所需的重要信息的功能，这些代码将用于定制数据库检索会话的各种进程。 通常，服务器包括一组数据库服务器，并且中间件在每个数据库服务器机器上运行，以在数据库服务器和客户端之间进行通信。 中间件提供了一个虚拟机，在其上执行以虚拟机语言编写的用户提供的代码，在整个数据库服务器集合中提供统一的接口，在该数据库服务器上将执行相同的用户提供的代码，确保用户提供的代码 在数据库服务器上执行指定的访问权限。

公开(公告)号：US07293036B2

公开(公告)日：2007-11-06

申请号：US11008335

申请日：2004-12-08

申请人： Surajit Chaudhuri ,  Ashish Kumar Gupta ,  Vivek Narasayya

发明人： Surajit Chaudhuri ,  Ashish Kumar Gupta ,  Vivek Narasayya

IPC分类号： G06F17/30

CPC分类号： G06F17/30536 ,  G06F17/30306 ,  G06F17/30312 ,  Y10S706/917 ,  Y10S707/99932 ,  Y10S707/99942 ,  Y10S707/99945

摘要： Relational database applications such as index selection, histogram tuning, approximate query processing, and statistics selection have recognized the importance of leveraging workloads. Often these applications are presented with large workloads, i.e., a set of SQL DML statements, as input. A key factor affecting the scalability of such applications is the size of the workload. The invention concerns workload compression which helps improve the scalability of such applications. The exemplary embodiment is broadly applicable to a variety of workload-driven applications, while allowing for incorporation of application specific knowledge. The process is described in detail in the context of two workload-driven applications: index selection and approximate query processing.

摘要翻译： 诸如索引选择，直方图调整，近似查询处理和统计选择等关系数据库应用程序已经认识到利用工作负载的重要性。 通常，这些应用程序具有大的工作负载，即一组SQL DML语句作为输入。 影响这些应用程序可扩展性的关键因素是工作负载的大小。 本发明涉及工作负载压缩，这有助于提高这种应用的可扩展性。 该示例性实施例广泛地适用于各种工作负载驱动的应用，同时允许结合应用特定的知识。 该过程在两个工作负载驱动的应用程序的上下文中进行了详细描述：索引选择和近似查询处理。

公开(公告)号：US06912547B2

公开(公告)日：2005-06-28

申请号：US10180667

申请日：2002-06-26

申请人： Surajit Chaudhuri ,  Ashish Kumar Gupta ,  Vivek Narasayya ,  Sanjay Agrawal

发明人： Surajit Chaudhuri ,  Ashish Kumar Gupta ,  Vivek Narasayya ,  Sanjay Agrawal

IPC分类号： G06F17/30

CPC分类号： G06F17/30536 ,  G06F17/30306 ,  G06F17/30312 ,  Y10S706/917 ,  Y10S707/99932 ,  Y10S707/99942 ,  Y10S707/99945

摘要： Relational database applications such as index selection, histogram tuning, approximate query processing, and statistics selection have recognized the importance of leveraging workloads. Often these applications are presented with large workloads, i.e., a set of SQL DML statements, as input. A key factor affecting the scalability of such applications is the size of the workload. The invention concerns workload compression which helps improve the scalability of such applications. The exemplary embodiment is broadly applicable to a variety of workload-driven applications, while allowing for incorporation of application specific knowledge. The process is described in detail in the context of two workload-driven applications: index selection and approximate query processing.

摘要翻译： 诸如索引选择，直方图调整，近似查询处理和统计选择等关系数据库应用程序已经认识到利用工作负载的重要性。 通常，这些应用程序具有大的工作负载，即一组SQL DML语句作为输入。 影响这些应用程序可扩展性的关键因素是工作负载的大小。 本发明涉及工作负载压缩，这有助于提高这种应用的可扩展性。 该示例性实施例广泛地适用于各种工作负载驱动的应用，同时允许结合应用特定的知识。 该过程在两个工作负载驱动的应用程序的上下文中进行了详细描述：索引选择和近似查询处理。

公开(公告)号：US20090256481A1

公开(公告)日：2009-10-15

申请号：US12177590

申请日：2008-07-22

申请人： Antony Neethi Manickam Kalugumalai ,  Ashish Kumar Gupta

发明人： Antony Neethi Manickam Kalugumalai ,  Ashish Kumar Gupta

IPC分类号： H01J7/44

CPC分类号： H05B41/295

摘要： A lamp filament preheating circuit using modified flyback topology which gives pulsating AC in the secondary of the flyback transformer. The circuit may be controller based or implemented by a monoshot and astable multivibrator. A self-oscillation, parallel resonant current fed half bridge inverter circuit may include an arc sensing circuit.

摘要翻译： 使用改进的反激拓扑的灯丝预热电路，其在回扫变压器的次级中产生脉动AC。 电路可以是基于控制器的或由单调和不稳定的多谐振荡器实现的。 自谐振并联谐振电流半桥逆变电路可以包括电弧感测电路。